chore(deps): bump longhorn::devops-stack-module-longhorn

Bumps [longhorn::devops-stack-module-longhorn](https://github.com/camptocamp/devops-stack-module-longhorn) from 3.6.0 to 3.8.0.
- [Release notes](https://github.com/camptocamp/devops-stack-module-longhorn/releases)
- [Changelog](https://github.com/camptocamp/devops-stack-module-longhorn/blob/main/CHANGELOG.md)
- [Commits](camptocamp/devops-stack-module-longhorn@v3.6.0...v3.8.0)

---
updated-dependencies:
- dependency-name: longhorn::github::camptocamp/devops-stack-module-longhorn::v3.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

examples/sks/main.tf

@@ -106,7 +106,7 @@ module "oidc" {
 }
 
 module "longhorn" {
-  source = "git::https://github.com/camptocamp/devops-stack-module-longhorn.git?ref=v3.6.0"
+  source = "git::https://github.com/camptocamp/devops-stack-module-longhorn.git?ref=v3.8.0"
 
   cluster_name   = module.sks.cluster_name
   base_domain    = module.sks.base_domain